US2591477A - Plastic clothespin - Google Patents

Plastic clothespin Download PDF

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US2591477A
US2591477A US107460A US10746049A US2591477A US 2591477 A US2591477 A US 2591477A US 107460 A US107460 A US 107460A US 10746049 A US10746049 A US 10746049A US 2591477 A US2591477 A US 2591477A
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webs
web
handle
leg
arcuate
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US107460A
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John B Tegarty
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T R ZETTELMEYER
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T R ZETTELMEYER
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F55/00Clothes-pegs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/44Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44641Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member
    • Y10T24/44769Opposed engaging faces on gripping member formed from single piece of resilient material
    • Y10T24/44872Opposed engaging faces on gripping member formed from single piece of resilient material having specific handle structure

Definitions

  • the present invention consti- .tutes a novel improvement in plastic pin structures o'f the general type Wherein the clothes tgrippinglleg members are integrallymolded with atop joining structure in the form of a handle.
  • Thepresent development is such as to meet the several structural and unctional requirements whihIhave found are conclucive to a successful jone of the features of the disclosed gripping 'legs can be obtained without increasing the over-all amount of pl astic material requird .tovbpro cute the pin.
  • the structure while being such as to produce the ,proper gripping fo'ce on the line, has been developed particularly to facilitate ready extrac- 'ticn of the product from the mold in that the tcross sectional areas of the various portions of .the 'integral structure are comparatively uniforrn while having draft allowance relative to a central mld parting plane.
  • ⁇ A 'further object is the provision in a plastc vmoldedopin of a ⁇ hollow handle, the hollowness ⁇ of .which causes thehandle sides to become part .of lthe fiexible beam structure of the legs, thus .increasing the length of the effective beam action Without increasing the over-all length of the pin.
  • ⁇ A still further object is the provision of a plastic pin'having such structural characteristics as ..to permit over-all shortening of the pin while i maintaining a satisfactory clamping function and ⁇ facilityof use.
  • Fig. 1 isa sperspective View of my new plastically molded clothespin
  • Fig. 2 is a front elevaticn of the pin in an unflexedior normal condition with an indication of the various fiexing portions thereof indicated by *the dot and dash lines;
  • Fig. 3 is a side elevation of the clothespin
  • VFig. 4 is a cross-sectional View taken through the handletportion along the plane indicated by theline l- 4 in Fig 2;
  • LFig. '5 is a cross-sectional View taken through the legs of 'the pin along the plane indicated by the line'5-5 in Fig. 2.
  • the 'clothespin is shown as being of substantial and uniform width, i. e., with the side edges of *all portions 01' parts terminating in two'parallel planes.
  • a hollow handle portion H is joined .to two synimetrical, solid leg portions L and R, by a "fulcrum "structure comprising a concave Web &and arcuate webs 'It and ll.
  • Handle sides 14 and 15 are'shaped to converge from 'the top connecting web alt thereof downwardly to the concave fulcrum portion 9.
  • the legs L and R are generally of .a T-section .Construction havingclothes gripping webs l'a'pro- Videdwith camming or piloting surfaccs [9.
  • the gripping webs extend upwardly' into the confines of the'arcuate portions Il] and H to terminate in a'U-shaped fiexingportion 28.
  • the l-ateral handlewebs M and !5 are pro- 3 vded with centrally located ribs or beam webs Na and l5a, respectively, which are connected by a web Nia.
  • the webs Ma, and l5a decrease in beam depth as the handle webs !4 and 15 converge downwardly and merge into the upper surface of the fulcrum portion 9.
  • the gripping webs !8 may be of the grooved formation shown for engagement with varying thicknesses of clothing when on the line.
  • the leg elements When the leg elements are flexed outwardly as, for example, to a position indicated by the dot and dash lines in Fig. 2, the arcuate webs o and ll and the U-portion 20 connecting the upper ends of the leg webs
  • the U web 20, by reason of its location relative to the fulcrum web 9, is in tension when the fulcrum web is in compression.
  • the mold parting line will be in a longitudinal central plane bisecting the outer and inner beam webs and appropriate draft or slope in the web structure is provided for quick extraction of the product.
  • transversel' transversely extending webs or similar terminology is used to the fulcrum portion 9, the loop 20, and the lateral portions M and !5 and top portion [6 of the handle.
  • a clothespin structure having an overall width of about g of an inch, an overall height of about 2.5 inches, and with all of the web sections or portions about of an inch thick will have both the gripping strength and the tensile strengthto meet 'the requirements, and that the overall size thereof is such as to be handled most Conveniently. Further weight reduction can be effected by making the clothes gripping webs from the bottom up to the arcuate webs o and l'l considerably thinner than of an inch.
  • the fulcrum web and the crotched loop connecting the leg webs can be so proportioned and located relative to each other and to the arcuate spring webs I& and Il that the resulting tensile stresses, when the leg structures are forced i apart, will be distributed, and not be concentrated at any particular point.
  • the reversed arcuate fulcrum web and the crotched loop 20 both serve to add to the leg clamping force when flexed as indicated.
  • the structure is such that the crotched loop 20 may extend upwardly a considerable distance toward the fulcrum web, thus permitting an over-all shortening of the pin structure and a corresponding and important saving of material. I have found, for example,
  • a unitary plastic clothespin structure comprising a pair of leg members integrally formed with transverse webs having a clothesline receiving slot therebetween, the leg members constituting the walls of said slot being formed without voids or perforations for substantially their entire length, with the slot terminating at its upper closedend in a free loop-shaped fiexible spring action transverse web portion, the leg webs having transverse arcuate web portions formed at the upper ends of the leg members with the spring action portion extending into the void between said arcuate portions, a reverse radius flexible spring action fulcrum member formed at the upper ends of said arcuate portions of the leg webs, and a spring action handle member joined to said arcuate portions of said leg members, said component parts being so arranged as to permit relative movement between said loop-shaped spring action portion and said fulcrum member longitudinally of the, pin and to provide means of transmitting the major portion of fiexing strain to said spring action handle member, thereby minimizing the strain on and Supplement-,ing the spring action of said fulcrum member and said
  • An integrally molded plastic clothespin having a hollow handle comprised of a transversely extended top web, and transversely extended lateral webs joined thereto, a transversely extended fulcrum web ⁇ connecting the said lateral webs at the bottom of said handle, said fulcrum web being bowed toward the bottom of the pin structure, transversely webbed leg structures curving at the top portions thereof to join the external lateral web surfaces of the handle structure, the said top portions having concave opposed inner surfaces, and an internally disposed crotch loop within the eoncave opposed inner surfacs of the leg structures and physically free thereof for connecting uncurved parts of the leg structures, said crotch loop extending upwardly toward said downwardly bowed outwardly bowed webs, and external strengthening ribs running the length of said leg portions over said outwardly bowed webs to merge into the bottom external portions of said'lateral webs above the said fulcrum web, said strengthening ribs being disposed at the longitudinal mid-plane of the pin. v
  • thermo-plastic clothespin having a, hollow handle and leg structures comprisng transversely extending web formations, the leg structures each being connected to the handle by outwardly bowed arcuate transverse webs, the leg webs being connected at the upper ends thereof by an inverted loop-shaped flexible web, with the loop formation freely disposed within the confines of the said arcuate webs, external beam webs centrally located on the leg webs with the beam portions extending around the said arcuate webs to the handle webs and joined thereto above the bottom terminus of the handle structure to prevent flexing of the gripping portions of the legs, and the bottom terminus of the handle structure comprising a fulcrum web arched in a direction opposite to the loop formation connecting the leg structures.
  • thermo-plastic clothespin having a hollow handle and leg structures comprising transversely extending web formations connected by transverse arcuate webs, the leg webs being connected by an inverted loop-shaped, flexible crotch web disposed within the confines of the said arcuate webs, an internal web centrally located as a rib within the handle webs and tapering in rib depth decreasingly toward the bottom of the handle webs whereby the sides of the handle structure are correspondingly increasingly flexible, an external bean web centrally located on each leg web and extending around the arcuate web to the handle web and joined thereto above the bottom terminus of the handle structure, said internal and external webs being located at a common longitudinal plane, and a downwardly arched fulcrum strut connecting the top regions of the arcuate webs and comprising the bottom terminus of the handle structure.

Description

April l 1952 J. B. TEGARTY PLASTIC CLOTHESPIN Filed July 29, 1949 ATTOBVEK .product. .s'tructurevis that the required spread of the line Patented Apr. I, 1952 PLASTIC 'CLOTI IESPIN .1 ohn B. Tegarty, Mentor, Ohio, assignor-to'T. R. Zettelmeyer, Willoughbm ohio, asutrustee Application July 29,1949, Serial No. 2107;460
A Claims. (mizi-+137) "This invention relates *to clothespins formed 4 ofther'noplastic materials and has for its general objecttheprovision of a' relatively highly flexible, stur`dy ,pin structure which can be economically produced by injection molding methods.
Morespecificallr, the present invention consti- .tutes a novel improvement in plastic pin structures o'f the general type Wherein the clothes tgrippinglleg members are integrallymolded with atop joining structure in the form of a handle. Thepresent development is such as to meet the several structural and unctional requirements whihIhave found are conclucive to a successful jone of the features of the disclosed gripping 'legs can be obtained without increasing the over-all amount of pl astic material requird .tovbpro duce the pin. Another feature is that the structure, while being such as to produce the ,proper gripping fo'ce on the line, has been developed particularly to facilitate ready extrac- 'ticn of the product from the mold in that the tcross sectional areas of the various portions of .the 'integral structure are comparatively uniforrn while having draft allowance relative to a central mld parting plane.
`A 'further object is the provision in a plastc vmoldedopin of a`hollow handle, the hollowness `of .which causes thehandle sides to become part .of lthe fiexible beam structure of the legs, thus .increasing the length of the effective beam action Without increasing the over-all length of the pin. `A still further object is the provision of a plastic pin'having such structural characteristics as ..to permit over-all shortening of the pin while i maintaining a satisfactory clamping function and `facilityof use.
In the drawings:
Fig. 1 isa sperspective View of my new plastically molded clothespin; i i
Fig. 2 is a front elevaticn of the pin in an unflexedior normal condition with an indication of the various fiexing portions thereof indicated by *the dot and dash lines;
Fig. 3 is a side elevation of the clothespin;
VFig. 4 is a cross-sectional View taken through the handletportion along the plane indicated by theline l- 4 in Fig 2; and
LFig. '5 is a cross-sectional View taken through the legs of 'the pin along the plane indicated by the line'5-5 in Fig. 2.
'In plastic clothespin structures of the general type to'which-the present invention relates various *tructures and pl-astic materials have been resorted to in order to meet the utilitarian'requirements of ithe'pin whil'eattempting toconservemolding material. 2;433,`171, issued December 23,'1947,'I disclosed a In my pri-or Patent No.
' plastic clothespinwherein*hollow or double Walled 'the pin structure.
'le'g structures were incorporated to join a'solid handle portion -the'eby to obtain' the required strength of line grip 'andheam flexibility without increasing too much-the overall plastic Volume of Whilethe utility of that'pin was'found to be satisfactory, persistent difliculty in extraction of the pin from themold, due tothe "hollow, double-walled character of the leg struc ture, interfered with the obtaining of the desired economy in production. t
'I'have found that it is'possbleto decrease the local 'flexing sensitivity `of the leg structures `'through eliminaticn o'f the hollowstructural feature While'obtaining the same extent of separation of the leg portions by making the handle 'portionhollow'whereby the 'sides of the'handle `'flex'inwardly as the leg portions are flexed outwardly. 'To 'accornplish this I have devised an integralfulcrum structure associated With the `crotch.structure` and all'in `a manner to properly .distribute 'the Vtensile stresses and prevent ;iracturin'g of the pin.
.Referring to the drawings, it will be noted that the 'clothespin is shown as being of substantial and uniform width, i. e., with the side edges of *all portions 01' parts terminating in two'parallel planes. Generally a hollow handle portion H is joined .to two synimetrical, solid leg portions L and R, by a "fulcrum "structure comprising a concave Web &and arcuate webs 'It and ll. Handle sides 14 and 15 are'shaped to converge from 'the top connecting web alt thereof downwardly to the concave fulcrum portion 9.
The legs L and R are generally of .a T-section .Construction havingclothes gripping webs l'a'pro- Videdwith camming or piloting surfaccs [9. The gripping webs extend upwardly' into the confines of the'arcuate portions Il] and H to terminate in a'U-shaped fiexingportion 28. The webs !ii-are 'reinforced with centrally located ribs or beam, "portions i l &a which extend `from the bottom bead 'formations !Sa `upwardly and outwardly and around the arcuate webs ill and l I and in upper `shape 'follow the arcuate shape of the webs ii] 'and `H to the lower converging portions of the lateral handle webs |4 and [5. These beampor- 'tions !Ba are provided with an outer rail or head structure |8b throughout the length. thereof,
which increases the defiecting strength of the :beam-and leg formation.
The l-ateral handlewebs M and !5 are pro- 3 vded with centrally located ribs or beam webs Na and l5a, respectively, which are connected by a web Nia. The webs Ma, and l5a, decrease in beam depth as the handle webs !4 and 15 converge downwardly and merge into the upper surface of the fulcrum portion 9.
The gripping webs !8 may be of the grooved formation shown for engagement with varying thicknesses of clothing when on the line. When the leg elements are flexed outwardly as, for example, to a position indicated by the dot and dash lines in Fig. 2, the arcuate webs o and ll and the U-portion 20 connecting the upper ends of the leg webs |8 are flexed as indicated and the fulcrum web 9 is placed in compression. Due to the beam structure of the legs and the continuation of that beam formaticn up and around the arcuate webs IO and ll the low reaches of the handle webs and beam structure thereof are flexed inwardly as indicated in Fg. 2. The U web 20, by reason of its location relative to the fulcrum web 9, is in tension when the fulcrum web is in compression. The mold parting line will be in a longitudinal central plane bisecting the outer and inner beam webs and appropriate draft or slope in the web structure is provided for quick extraction of the product.
In the claims, "transversel' "transversely extending webs, or similar terminology is used to the fulcrum portion 9, the loop 20, and the lateral portions M and !5 and top portion [6 of the handle. Transverse" or transversely extending" signifies that these ribbon-like web structures have the widths thereof extending perpendicular to a plane which would be at right angles to a clothes line when the pin is in normal use.
I have found that a clothespin structure having an overall width of about g of an inch, an overall height of about 2.5 inches, and with all of the web sections or portions about of an inch thick will have both the gripping strength and the tensile strengthto meet 'the requirements, and that the overall size thereof is such as to be handled most Conveniently. Further weight reduction can be effected by making the clothes gripping webs from the bottom up to the arcuate webs o and l'l considerably thinner than of an inch. Commercial forms of polystyrene thermal molding compounds have been found to be the most economical from both a base materal and ejection molding viewpoint although the pins could be made of acrylic resin, cellulose acetate or other suitable thermo-plastic materials'of the proper tensile strength in the final molded condition.
It will be noted that by taking full advantage of the fiexibility of the handle sides or webs the fulcrum web and the crotched loop connecting the leg webs can be so proportioned and located relative to each other and to the arcuate spring webs I& and Il that the resulting tensile stresses, when the leg structures are forced i apart, will be distributed, and not be concentrated at any particular point. The reversed arcuate fulcrum web and the crotched loop 20 both serve to add to the leg clamping force when flexed as indicated. The structure is such that the crotched loop 20 may extend upwardly a considerable distance toward the fulcrum web, thus permitting an over-all shortening of the pin structure and a corresponding and important saving of material. I have found, for example,
that with a pin of the size hereinbefore stated lt is possible to obtain a production of from to pins per pound of molding material as compared to the most favorable production of 120 pins per pound of prior pin structure mentioned.
I claim:
l. A unitary plastic clothespin structure comprising a pair of leg members integrally formed with transverse webs having a clothesline receiving slot therebetween, the leg members constituting the walls of said slot being formed without voids or perforations for substantially their entire length, with the slot terminating at its upper closedend in a free loop-shaped fiexible spring action transverse web portion, the leg webs having transverse arcuate web portions formed at the upper ends of the leg members with the spring action portion extending into the void between said arcuate portions, a reverse radius flexible spring action fulcrum member formed at the upper ends of said arcuate portions of the leg webs, and a spring action handle member joined to said arcuate portions of said leg members, said component parts being so arranged as to permit relative movement between said loop-shaped spring action portion and said fulcrum member longitudinally of the, pin and to provide means of transmitting the major portion of fiexing strain to said spring action handle member, thereby minimizing the strain on and Supplement-,ing the spring action of said fulcrum member and said free loop-shaped portion and providing a multiple spring action structure adapted to preclude straining beyond the normal fiexual limits of any one or all of the component spring action parts while under stress of normal 2. An integrally molded plastic clothespin having a hollow handle comprised of a transversely extended top web, and transversely extended lateral webs joined thereto, a transversely extended fulcrum web` connecting the said lateral webs at the bottom of said handle, said fulcrum web being bowed toward the bottom of the pin structure, transversely webbed leg structures curving at the top portions thereof to join the external lateral web surfaces of the handle structure, the said top portions having concave opposed inner surfaces, and an internally disposed crotch loop within the eoncave opposed inner surfacs of the leg structures and physically free thereof for connecting uncurved parts of the leg structures, said crotch loop extending upwardly toward said downwardly bowed outwardly bowed webs, and external strengthening ribs running the length of said leg portions over said outwardly bowed webs to merge into the bottom external portions of said'lateral webs above the said fulcrum web, said strengthening ribs being disposed at the longitudinal mid-plane of the pin. v r
4. A thermo-plastic clothespin having a, hollow handle and leg structures comprisng transversely extending web formations, the leg structures each being connected to the handle by outwardly bowed arcuate transverse webs, the leg webs being connected at the upper ends thereof by an inverted loop-shaped flexible web, with the loop formation freely disposed within the confines of the said arcuate webs, external beam webs centrally located on the leg webs with the beam portions extending around the said arcuate webs to the handle webs and joined thereto above the bottom terminus of the handle structure to prevent flexing of the gripping portions of the legs, and the bottom terminus of the handle structure comprising a fulcrum web arched in a direction opposite to the loop formation connecting the leg structures.
5. A thermo-plastic clothespin having a hollow handle and leg structures comprising transversely extending web formations connected by transverse arcuate webs, the leg webs being connected by an inverted loop-shaped, flexible crotch web disposed within the confines of the said arcuate webs, an internal web centrally located as a rib within the handle webs and tapering in rib depth decreasingly toward the bottom of the handle webs whereby the sides of the handle structure are correspondingly increasingly flexible, an external bean web centrally located on each leg web and extending around the arcuate web to the handle web and joined thereto above the bottom terminus of the handle structure, said internal and external webs being located at a common longitudinal plane, and a downwardly arched fulcrum strut connecting the top regions of the arcuate webs and comprising the bottom terminus of the handle structure.
JOHN B. TEGARTY.
EEFERENCES CITED The following references are of record. in the file of this 'patent:
UNITED STATES PATENTS Number Name Date D. 13'7,583 Lytle Apr. 4, 1944 2,433,171 Tegarty Dec. 23, 1947
US107460A 1949-07-29 1949-07-29 Plastic clothespin Expired - Lifetime US2591477A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2910753A (en) * 1957-01-25 1959-11-03 Petcar Res Corp Clothespin
US2931086A (en) * 1955-11-03 1960-04-05 Rose Martin Synthetic resin clothes pin
US2941426A (en) * 1957-10-10 1960-06-21 Black & Decker Mfg Co Chuck key holder
US3425389A (en) * 1967-08-28 1969-02-04 Gloria C Sacco Place marker aid
US3666228A (en) * 1970-11-09 1972-05-30 Owens Illinois Inc Refrigerator clip
US4514885A (en) * 1983-02-14 1985-05-07 Delahousse R Clip with two stable positions of the clothes pin type
US4813107A (en) * 1987-09-04 1989-03-21 Warren Tool Corporation Spring clamp
US4839947A (en) * 1988-07-14 1989-06-20 Robert Cohen Clamp mechanism
US5417926A (en) * 1993-08-20 1995-05-23 Laboratoire C.C.D. Device for the support and protection of a micropipette
US5765820A (en) * 1995-08-17 1998-06-16 Marusiak; Frank Three-way spring clamp
US20050048640A1 (en) * 2003-08-25 2005-03-03 Gen-Probe Incorporated Clamp and method of making same
WO2008077784A1 (en) * 2006-12-22 2008-07-03 BSH Bosch und Siemens Hausgeräte GmbH Refrigerator
US20190316288A1 (en) * 2016-06-30 2019-10-17 Tommy Workman Plastic clip and method of construction

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433171A (en) * 1947-01-02 1947-12-23 John B Tegarty Plastic clothespin

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433171A (en) * 1947-01-02 1947-12-23 John B Tegarty Plastic clothespin

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2931086A (en) * 1955-11-03 1960-04-05 Rose Martin Synthetic resin clothes pin
US2910753A (en) * 1957-01-25 1959-11-03 Petcar Res Corp Clothespin
US2941426A (en) * 1957-10-10 1960-06-21 Black & Decker Mfg Co Chuck key holder
US3425389A (en) * 1967-08-28 1969-02-04 Gloria C Sacco Place marker aid
US3666228A (en) * 1970-11-09 1972-05-30 Owens Illinois Inc Refrigerator clip
US4514885A (en) * 1983-02-14 1985-05-07 Delahousse R Clip with two stable positions of the clothes pin type
US4813107A (en) * 1987-09-04 1989-03-21 Warren Tool Corporation Spring clamp
US4839947A (en) * 1988-07-14 1989-06-20 Robert Cohen Clamp mechanism
US5417926A (en) * 1993-08-20 1995-05-23 Laboratoire C.C.D. Device for the support and protection of a micropipette
US5765820A (en) * 1995-08-17 1998-06-16 Marusiak; Frank Three-way spring clamp
US20050048640A1 (en) * 2003-08-25 2005-03-03 Gen-Probe Incorporated Clamp and method of making same
WO2008077784A1 (en) * 2006-12-22 2008-07-03 BSH Bosch und Siemens Hausgeräte GmbH Refrigerator
RU2447379C2 (en) * 2006-12-22 2012-04-10 Бсх Бош Унд Сименс Хаусгерете Гмбх Refrigerator
US20190316288A1 (en) * 2016-06-30 2019-10-17 Tommy Workman Plastic clip and method of construction

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